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Deprecation warnings for old syntax:
var x = _
* In `3.4` we emit the deprecation warning * In `future` we emit we make this syntax an error * Add patch. Not ideal because we need to use the full path of `uninitialized`
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-- Error: tests/neg/uninitialized-3.4.scala:7:15 ----------------------------------------------------------------------- | ||
7 | var a: Int = _ // error: migration warning | ||
| ^ | ||
| `= _` has been deprecated; use `= uninitialized` instead. | ||
| `uninitialized` can be imported with `scala.compiletime.uninitialized`. | ||
| This construct can be rewritten automatically under -rewrite -source 3.4-migration. |
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//> using options -Werror | ||
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import scala.language.`3.4` | ||
import scala.compiletime.uninitialized | ||
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class Foo: | ||
var a: Int = _ // error: migration warning | ||
var b: Int = uninitialized |
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//> using options -Werror | ||
|
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import scala.language.`future-migration` | ||
import scala.compiletime.uninitialized | ||
|
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class Foo: | ||
var a: Int = _ // error: migration warning | ||
var b: Int = uninitialized |
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import scala.language.future | ||
import scala.compiletime.uninitialized | ||
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class Foo: | ||
var a: Int = _ // error | ||
var b: Int = uninitialized |
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Original file line number | Diff line number | Diff line change |
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import scala.language.`future-migration` | ||
import scala.compiletime.uninitialized | ||
|
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class Foo: | ||
var a: Int = _ // warn | ||
var b: Int = uninitialized |
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Original file line number | Diff line number | Diff line change |
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class Foo: | ||
var a: Int = scala.compiletime.uninitialized |
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Original file line number | Diff line number | Diff line change |
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class Foo: | ||
var a: Int = _ |